Standard Input Output Norms govern permissible inputs and usage assurance for forged carbon steel machined parts exports under FTP controls. Standard Input Output Norms for forged carbon steel/non alloy steel machined parts (SION C1506) set product specific input standards: primary forging quality carbon steel inputs quantified relative to export weight; rust preventing chemicals and specified miscellaneous items admitted with valuation tied to FOB export value; and a schedule requires determination of permissible input proportions and an applicant assurance that imported goods are those used or required in the export product.